diff options
| -rw-r--r-- | drivers/acpi/hardware/hwxface.c | 37 | ||||
| -rw-r--r-- | include/acpi/acpixf.h | 2 |
2 files changed, 39 insertions, 0 deletions
diff --git a/drivers/acpi/hardware/hwxface.c b/drivers/acpi/hardware/hwxface.c index b6244a0fcf4..0601ed711f3 100644 --- a/drivers/acpi/hardware/hwxface.c +++ b/drivers/acpi/hardware/hwxface.c @@ -50,6 +50,43 @@ ACPI_MODULE_NAME("hwxface") /****************************************************************************** * + * FUNCTION: acpi_reset + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Set reset register in memory or IO space. Note: Does not + * support reset register in PCI config space, this must be + * handled separately. + * + ******************************************************************************/ +acpi_status acpi_reset(void) +{ + struct acpi_generic_address *reset_reg; + acpi_status status; + + ACPI_FUNCTION_TRACE(acpi_reset); + + reset_reg = &acpi_gbl_FADT.reset_register; + + /* Check if the reset register is supported */ + + if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) || + !reset_reg->address) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + /* Write the reset value to the reset register */ + + status = acpi_write(acpi_gbl_FADT.reset_value, reset_reg); + return_ACPI_STATUS(status); +} + +ACPI_EXPORT_SYMBOL(acpi_reset) + +/****************************************************************************** + * * FUNCTION: acpi_read * * PARAMETERS: Value - Where the value is returned diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index 030aeb556e6..b3bceadf6f7 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -322,6 +322,8 @@ acpi_resource_to_address64(struct acpi_resource *resource, /* * Hardware (ACPI device) interfaces */ +acpi_status acpi_reset(void); + acpi_status acpi_get_register(u32 register_id, u32 * return_value); acpi_status acpi_get_register_unlocked(u32 register_id, u32 *return_value); |